Stove-mat



L .jthat the steering of the vehicle may be efi T on whom it may concern:

EMILZF. rionnmus, or PEORIAQ'ILLINOIS, ASSIGNOR TO THE onr Manurncrtimne oomrm; or sroc rorr, CKLIFOR-NIA, A CQBPORATION or CALIFORNIA.

,, TRANSMISSION MECHANISM.

constructionand particularly pertains to a steering transmission for tractors. I

- The present invention is concerned w th a driving and steering means for tractors,

similar in operation to that disclosed in my co-pending application entitled Tractor transmission and which bearsthe filing date Sept.17, 1918, and Ser. No. 254,443. In transmission mechanisms of sins par- I ticular type, it-is desired to provide uni'nter rupted driving means for independently actuating the two driving units of a tractor and to furthermore provide power dr ven {means adapted to be selectively controlled dent to the steering operation.

The present invention contemplates they to vary the relative speeds of the two traction units, thereby elim nating the. use of friction brakes and clutches and lnsuri'ng fected with a minimumflos's of power'inciuse of a main driving shaft adapted to be driven at variable speeds through a set of speed changing gears and to impart motion to separately opera-ted driving nnlts, sald I Fig.v 3 is a fragmentary'view and plan,

main .shaft being furthermore adapted to.

drive means for producing variable speeds of rotation for thetwo traction units driven thereby. The invention is illustratedby way of eg'rample in the accompanying drawings in which Figure-1 is a view in side elevation, illustrating a completely assembled tractor'upon which the transmission mechanism is,uti lized, the view further disclosing parts as broken away for the-sake of clearness and convenience. f 1 Fig.2 is a view in longitudinal section as seen'centrall-y of the transmission mechanism; particularly disclosing the speed changing gears and the steering clutches.

F, NORELIUS; a

specification of Letters Patent- Patented Oct. .2 6; 1920'. Application fil'ed November '8, 1918 Serial No. 261,632.

illustrating the complete transmission mechanism Withparts removed, to more clearly dlsclose the relation of the driving shafts with the axle of the separate traction units.

Fig.- 4 is a viewin transverse section and elevation, disclosing the driving axle of the traction units and the power transmission means in connection therewith. F g. 5 1s a view n end elevation, disclosmg one of the traction driving sprockets V and the planetary gear arrangement'in the endthereof.

transmission.

modified form of steering Referring more particularly to the drawings, 10 indicates a tractor main frame at the-opposite sides of which are positioned truck roller frames 11. These framesareyieldably mounted to' support the main frames byv means of an equalizer mechanism 12' at their forward ends and spring members 13 interposed between their rear ends and the frame, As is customary, the frame members 11 provide mountings for load sup porting rollers 14, which, in turn, bear upon the lower run of a track chain 15; The forward ends of the truck roller frames are fitted with idler sprockets 16, around which the chains pass while the opposite end of the chain passes around the driving sprockets 17. These sprockets are provided'with their. f

rotating .axes in fixed relation to an axle '18,v which is mounted transversely of the main -frame and is rotatably supported within a transmission case 19. Each of these sprockets is formed with an internal ring gear 20., as" particularly shown in Fig 5.

Thesegears are .in constant mesh 'with a plurality of small planetary gear 'pinions 21; which are'mounted 'for independent rotation upon the several arms of a gear; spider 22. The gear spiders are free :to rotate around the axis'ofthe axle 18 and support the pinionsr 91 in meshwith the ring gears 20 and drivin gears 23. These: last named gears are fixedto the opposite ends of the axle 18 andv impartmotion to the'sprockets from this axle.

UNITED STA ATENT or fice} ALICE J. PABKHURST, F FLINT, MICHIGAN.

STOVE-MAT.

To all whom it may concern:

Be it known that I, ALIon J. PARKHURST, a citizen of the United States, and a resident of the city of Flint, county of Genesee and State of Michigan, have invented certain new and useful Improvements in Stove- Mats, of which the following is a specification.

ject of My invention relates to improvements in stove mats or Covers, designed for use in connection with cooking utensils. The obmy invention is the production of a device of this character through the medium of which heat will be conserved in cooking, and burning of the material-or substance cooked prevented. further object is the production of a device of the character mentioned, which will be of durable and economical construction and efficient in use;

Other objects will appear hereinafter.

The invention consists in the combinations and arrangements of parts hereinafter de-' scribed and claimed.

The invention will be best understood by reference to the accompanying drawings forming a part of this specification, and in which, I

Figure 1, is' a partially sectional perspective view of a device embodying the invention, the cover thereof being shown in partly open position, and Fig. 2, a central section through the device.

The preferred form of construction, as illustrated in the drawings, comprises a comparatively thin flat body consisting of two shallow trays 3 and a, having their backs or bottoms registering and secured together by rivets 5.

The upper tray 4 is provided with a re movable cover 6, which is formed at opposite edges with flanges 7 adapted tovslidably engage with flanges 8 provided atcorresponding edges of said tray 4.. The arrangement is such, as will be seen, thatthe cover 6 may be readily slid to and from po sition,

the same being held in operative position through friction. Arranged in' the bottom of tray 4 is a covering or layer 9 of asbestos, or other suitable non-heat con-. ducting material, and arranged over said layer 9 is a layer of heat retaining material 10, common fine granulated table salt being.

preferably used for this purpose. At one side of the mat is provided a suitable handle '11.

In using the device, the same is placed under the mat, preventing spreading beyond Patented Oct. 26, 1920.

. Application filed November 29, 1918. Serial No. 264,552. I

the edges thereof and thus utilizing to a maximum the heat thereof. The layers 9 and 10 prevent burning of the substance or .material being cooked. The layer of salt,

in addition, is adapted to retain the'heat,

rendering it necessary to maintain only a f very low flame after the device has once been heated through. A saving of fuel is thus effected. Q 7 f While I have illustrated and described the preferred form of construction for carrying my invention into effect, this is capable of variation and modification without departing from the spirit of the invention. I, therefore, do not wish to be limited to the precise details of construction set forth, but

desire to avail myself of such variations and modifications as come within the scope of the appended claim. 7

Having described my invention, what I claim as new and desire to secure by Letters Patent is A stove'mat comprising a bodyformed of two comparatively'shallow trays having their bottoms registering with each other and secured together; a cover. for the open side" of one of said trays; a downwardly projecting flange on the lateral edges of said cover, the lower portions of said flanges being turned inwardly and upwardly,said

upwardly turned portions being engaged in a channel formed by a downwardly pro jecting flange on the lateral edges of said tray; and a filler of heat retaining material arranged in said last mentionedtray, substantially as described, 1

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses. I ALICE J.-PARKHUIST. Witnesses: 1 V

ELMA EASTON, CLARA- J. .BUELL. 

